This fantastic book is a brilliant introduction to cryptography, complete with concise and simple explanations covering transposition and substitution ciphers, codes, and their solutions. Contained within this book are more than 150 cryptographic problems providing practical applications as well of tests of ingenuity a must-have for any aspiring cryptographer. As well as showing a detailed history of cryptography throughout the years, this effective book gets the reader solving problems with various cryptographic methods, starting simply and progressing to tasks of incredible complexity. Clear and concise, this book is a definitive introduction to the field and deserves a place in any cryptographic library. Originally published in 1955, this scarce book is proudly republished now with an introductory biography of the author."

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ Advice To Forest Planters In The Plains Region; Issue 888 Of Farmers' Bulletin Seward Dwight Smith U.S. Dept. of Agriculture, 1917 Gardening; Trees; Gardening / Trees; Nature / Trees & Forests; Tree planting